New "configure" ncurses detection code #4435

Job	Run time
build-ubuntu-latest-full-featured-gcc	51s
build-ubuntu-latest-minimal-clang	1m 10s
build-ubuntu-latest-full-featured-clang	1m 3s
build-ubuntu-latest-minimal-gcc	42s
build-dragonflybsd-latest-gcc	2m 46s
build-freebsd-latest-clang	3m 34s
build-macos-latest-clang	42s
build-netbsd-latest-gcc	3m 6s
build-openbsd-latest-clang	3m 8s
build-ubuntu-latest-clang-analyzer	1m 15s
build-solaris-latest-gcc	5m 18s
build-ubuntu-latest-clang-sanitizer	1m 2s
build-ubuntu-latest-gcc-static	56s
lint-pcp-config	6s
build-ubuntu-latest-pcp	43s
lint-whitespace	3s
	26m 25s

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